Electric-railway system.



IL F. SAPJSHMCJ,

ELECTRIC RAILWAY SYSTEM.

MPLIOATION mmm AUG. 19, 1904,

901,997, mamma. ma. 2f?, ma

` Fi L g iv ` "5 fa 7; wam,

UiNiTED srniilnsv HR/MJF, F. PRSHALL, OFLONDON WALL, LONDON, ENGLAND,ASSIGNOR T() ('liii'iitL ELECTRIC GOMPAN Y, A C(')RPORATION Oi" NEWYORK.

ELECTRIC-RAILWAY sYsTEM.

Specification oi' Letters Patent.

:Patented ost. s?, iooo.

Anulfotion led ugust 19, 1904i. Serial No. 221,324.

way Systems, of which the following is iispecifioation. l

.My invention relates to electrical railway systems, employing a bare.conductor 'for ti'zinsniittingir `the `power from the source to thelocomotive or train. In such systems it nmy `bel nooessory in`eertii'incoses for reasons of economy toiohoi'ge the conduct-or to ohigh tension which may he inconvenient to use along certain portions ofthe railway, suoli :is pssseiig'or stations, 'yards and under lowbridges, where it becomes advisable to ln' suohsystsnis employing :iConductor charged charge` the conductor nt n low tension;

tof il highy tensionI iiiid having sections which :tie'olnirgod tolti.low-tons1on it 1s necessary that ,the tension it1tlietoiininois oftheino-` to'r r.or` motors-on the loooinotivoor train sliollltll be thesinne whether the trriin is" takiliiiicnrrontfroin `thehigfh tension orlow#` tension conductor except yfor the' comparse tivelysnnillwhiingostlue*to'the dro i `in the hat the' .operation h v`WhiOlirhs is effected should he" :tutonnit ic and should 'involve nomore thon :i momentary intorrnntion of supphj to the motors. w l

ln ono oi its nspoots; iny invention consists in providing;r nutonniticineiins` foi cli/iiiigigirigfV tln,x coniiootionszoi. :t cui'mrrnitivlimi passing iront :iflowonsion to a liiightonsion section,

or. viceversa.

In iiA 'furtheri-fisnect, my `invention f ionik the. switch. when: tho:oar 'p iisses from one `sootiontoiinothor.- '4

More specificallyxoonsidered," my invention consists in placing` ing,r Lcondncton* Wliiehi are energized hv4 currents:diiloringfinfeliitritcteryin di'llrent 'positions.;relativeti f tinck,so y that Ithe colleot`y ing deviceron Athe om' is shifted in" pnssing"fr'mmm santiohto finothen sind in utilizing the Vsections oi' the Work'-this shifting motion to oporzito ii switch in the oor circuit.

My invention will oost he understood hy refereiieeto the accompanyingdrawings, in which v Figure l `shows diagramiinittioolly ittrztnsmission lino comprising sections energized hy currents diiieiinginQhoinoter ond arranged in neem-dance with nh invoi'ition; sind Fig'.shows diiigrnninnitioslly tho enr eiionits sind the nntoniotioControlling ins/:ins there-iol,

In Fig. 1, C ropizesents ii ser carrying o. spring-pressed trolley-nimT, whioh i-shiim'n in engagement with the higlntnnsion sociion H of :itrolley-Wire. L irepifoseiits :i lonnit-nf sion section of :itroiieyswiie whioh sopin rated from zi high-tension sootion hi thefa-..... snoit dead section D. ino iii/glnteinsmii und 'loir-tensionsections firs piaci-d. :it diii'oront `heights @here the timoh, so tinitiii missing' from ons to the other, the trolyyzirii1 bo lowered orraised. l toko adv n Y this movement of the trolleiniiii to ojiiointothe! devices for limiting; ther proper oii'onit "changes on the oar.Thus, in Fig. l hnve shown the trolley-iirni 'l opei'fitivoiy connect-,odto :i pivoted bin* or lever li', theI opposite `ends of which areopiiativoiff Conni-etsii 'o two oilgswitohes it and t. The swim i.

shown in its closed pi'isitionv and the swioh .if in its open position,the troii y "i Ewing in on ,sagement with the iigh-tonsi closed fromtioliey-`wire H through iroiie)-4 urin T, switch it, und primary ot'rnnsioinioi' A, to earth. The. ssooiidziry of trnnf-i`oriiwr vA isnominated to tho motor iai, sind tho tiniis'ornioi is designed to reducithe voltage 'to tho wopor sinountini the nioior. JJhon `thevtrolley-:nin 'l reaches the, point between high sind low-tensionsections, it is depressed `sons to open the sWitvh/t hoi'oio leaving tholiiglntonsion section. 'lhe higintension oir ouit isfconsequentiy brokenby the switch le', instead? of by trolley-min T leaving' thehighteision' section. inthis waxy nroing" und de- Apreoiiition of thetrolley-Wire ind troiiejvr Wheel nre avoided. Switch h is nrrsngod toopen before. switch Z is olosed.' The hitter switch is not closed 'untiliiftoi the troilovh 'firm Tihas pnssod the dond seo/tion i). :1nd has enteiod on the low-tension sont ion4 Tho opening of switoh h and thodosing oi' s witohl opens the' primary 'oi' irons'oi'nni' und closes nycircuit from troiiepni'ni 'l dilos` lltl

l rectly through motor M, tok earth. The

' tion connection ma voltage of the low-tension, section is thusinipressed directly on the motor.

When the change isfrom high-tension alternating to low-tensiondirect-current, the solenoid S is provided, controlling a switch sarranged to open the circuit of the secondary of' transformer A. When.switch h is open, denergizing transformer A, solenoid S is deenergizedand opens the switch s. This prevents damage to the transformer, due toow of direct-current through its secondary when switch l is closed. Whenchanging from high-tension to low-tension alternatingy current, it isnot necessary to employ the automatic switch s. y A

In order to avoid-a continual small movement of the switches h and l,due to the usual Vand unavoidable variation in the 'height of differentportions of the same section of a trolley wire, the bar Bv is connectedto switches h and Z- through a-lost-motion'connection which givessufficient play to the trolley-arm to enable itto follow the ordinar Ivariations in height in the trolley-wire wit outfmoving the-switches.This lost mo take various forms as, for instance, the en s of the bar Bmay play between separated shoulders or sto s h* and h2 and Z1 and Z2secured to the .Inova le members of switches h and Z, respectively. Inthe position'illustrated in Fig. 2, the trolley is in itsV extreme highposition, and one end of the arm B is in engagement with the lowershoulder orv stop h1 of the switch h. At points where the trolleywire isdepressed slightly, the bar B is free to oscillate from the shoulder orstop h1 to the shoulder o rstcp 7b2 without affecting the switch. Thedistance between the shoulders or stops .t and h2 and similarly betweenl .and Z2 is such that ordinary irregularities in the height of thetrolley I wire do not affect the switches.

Although I have lshown the switching devices on the car operated by atrolley-arm and over-head wire, it will be understood that my inventionis not limited to thisv particular arranffement.- The switching devicesmay obviously be operated from a collectorshoe traveling on a third railwhich has its sections arranged at diiferentheights above the ground, orat different distances from the car. Moreover, the meansior operatingthe switches may be wholly independent of the current-collectingdevices. Any suitable operative connection may be em loyed between thcmovable member and tiie'switches in place of the direct mechanicalconnection shown. Consequently,`I aim in the append-y ed claims toco'ver any suitable means for operating a movable member on a car atthe' entrance to a section energized. by current of a diil'erentcharacter, together with means for utilizing the movement of said memberfor producing a change in the car circuits.

moving the switch from one position to ari--A other when thecollecting'device passes from one section of conductor to another.

2. In an electric railway systcnna conductorhaving sections ener ized byvcurrents differing in character, sai sections being arranged atdifferent heights above the track, a

car, circuits thereon,` a trolley carried by the car and adapted toengage said conductor,- and means on the car operated by the trolley forchanging the connections of the car circuits when the trolley tion ofconductor to another.

3. In an electric railway s stem, a conductor adapted to be engaged' y amoving car and comprising sections energized by evi-fs rents difleringincharacter, a car, circuits thereon, a movable member carried by thecar, means stationed at a point between said sections for engaging andmoving said member, a switch on the car adapted to change theconnections of the car circuits, and operative connections between saidswitch and said member.

4. In an electric railway system, a working conductor having sectionsenergized by currents differing in character, a car, circuits thereon, acollecting device carried by the.

car' and ada ted to en age said conductor, the said sections beingifierently positioned relatigely'to the track so that said collectingdevice issh'ift'd'in passing from one section to another and meansoperated by the shifting of said device for changing the circuitconnections on the car.

5. In an electric railway system, a working conductor' comprisinsections energized lby currents differing in c positioned relativelyf,the track, a car, circuits thereon, a collecting device carried by thecar and adapted to be shifted in passing from one section to another,aswitch adapted to change the connections of thc car circuits, andoperative connections between said device and said switch.

In an electric railway system, a trolleywi comprising sections energizedby currentsA varying in character and suspended at different heightsabove the track, a car, circuits thereon, a spring-pressed trolley-armcarried bythe car adapted to engage said conductor and to be raised andlowered in passing from one section to another, a switch adapt-ed tochange the connections of the car passes from one secaracter anddifferently lit ,transformer and to connect the motors dil-"- circuits,and operative connections between said arm and said switch` 7. Inanelectric railway system, a conduc tor having/sections energized bycurrents dil'jtering in character, a car, a motor-circuit thereona'collecting device carried by the car and adapted to engage saidconductor, a transformer havingits primaryI connected to saidl deviceand its secondary to the motorcircuit of the car, switches, adapted toopen the circuit of said transfornier'and to connect the motor-circuitdirectly to the collecting device, and ineans'stationed at a pointbetween said sections for operating said switches.

'8. In an electric railway,l a working conductor comprising sectionsenergized by currents differing in character and diierently positionedrelatively to the track, a car, a motor-circuit thereon a collectingrdevice car ried by the car and adapted to engage said conductor and tobe shifted in position in passing from one section to another,` atransformer having its primary connected to said collecting lejvire andits secondary connected to the motor circuit on the car, switchesadapted to `open the circuit of said rectly to the collecting device,and operativ? connect-ions between said switches and. said device,wherebysaid switches are operated when said device is shifted inposition.

9. In an electric railway system, a conducrents diileri'ng in character,a car, circuits thereon, a movable member` carried by the car, meansstationed at a point between said sections for engaging and moving saidmens ber, switches on the car arranged to estab lish ditierentconnections of thecar circuits, and operative connections between saidswitches and said member, the operating 'means for said member and theconnections between said member and said 'switches be ing arranged toopen one of said switches before the car leaves one of said sections andto close the second switch after the car reaches the second section.

ing conductor comprising sections energized by currents differing incharacter and d1ii'erently positionedrelativeiy to the track, a car7circuits thereon, a collecting device carried by the car and adapted tobe shifted in passing from one section to another, a switch adapted tochange the connections of the car circuits, and operative connectionsbetween said device and said switch, said. connections comprising alost-motion connection adapted to permit a certain amount of play ofsaid collecting devieeiwithout moving said switch. II witness whereof Ihave hereunto set my hand this eighth day of AugustflQOLi. y -HORACE F.PARSHALL, Witnesses: R. Wnsrncorr,

tor adapted to beh engaged by a `moving car FREDK L. Rani). i

and comprising sections energized by iciir- 10. In an electric railwaysystem, a work-

